compositor-wayland: use input region instead of opaque region to zxdg_shell_v6::set_window_geometry

The opaque region is a few pixels off due to the rounded corners
of the frame decorations, and, therefore, the input region
matches the window's geometry more closely.

Signed-off-by: Sergi Granell <xerpi.g.12@gmail.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>

libweston/compositor-wayland.c

@@ -779,12 +779,6 @@ wayland_output_resize_surface(struct wayland_output *output)
 		wl_surface_set_input_region(output->parent.surface, region);
 		wl_region_destroy(region);
 
-		frame_opaque_rect(output->frame, &ix, &iy, &iwidth, &iheight);
-		region = wl_compositor_create_region(b->parent.compositor);
-		wl_region_add(region, ix, iy, iwidth, iheight);
-		wl_surface_set_opaque_region(output->parent.surface, region);
-		wl_region_destroy(region);
-
 		if (output->parent.xdg_surface) {
 			zxdg_surface_v6_set_window_geometry(output->parent.xdg_surface,
 							    ix,
@@ -793,6 +787,12 @@ wayland_output_resize_surface(struct wayland_output *output)
 							    iheight);
 		}
 
+		frame_opaque_rect(output->frame, &ix, &iy, &iwidth, &iheight);
+		region = wl_compositor_create_region(b->parent.compositor);
+		wl_region_add(region, ix, iy, iwidth, iheight);
+		wl_surface_set_opaque_region(output->parent.surface, region);
+		wl_region_destroy(region);
+
 		width = frame_width(output->frame);
 		height = frame_height(output->frame);
 	} else {